Soluble mesothelin related peptides (SMRP) and osteopontin as protein biomarkers for malignant mesothelioma: Analytical validation of ELISA based assays and characterization at mRNA and protein levels
These assays provide reliable and reproducible quantitation of SMRP and OPN proteins. Both are increased in mesothelioma patients compared to non-mesothelioma controls. However, the two analytes do not correlate with each other and show distinct expression profiles and protein expression. Concentrations of SMRP but not OPN are decreased in post-surgical samples. Our results further characterize these markers, establish assay performance characteristics, and lay the groundwork for further studies to measure these markers in blood.